#include<fstream>
#include<iostream>
#include<stack>
using namespace std;
stack<int> x;
stack<char> c;
int main()
{
    ifstream si;
    si.open("evaluare.in");
    ofstream so;
    so.open("evaluare.out");
    char a;
    int z;
    int i,d,e,f;
    while(si>>a)
    {
        if('0'<=a&&a<='9')
        {
            z=a-'0';
            while(si>>a&&'0'<=a&&a<='9')
            {
                z=z*10+a-'0';
            }
            x.push(z);
          //  cout<<z<<endl;
        }
        if(si.eof()==true)
            break;
      //  cout<<a<<endl;
        if(a=='+'||a=='-'||a=='*'||a=='/'||a=='(')
        {
            //cout<<endl<<c.size()<<endl;
            c.push(a);
            //cout<<endl<<c.size()<<' '<<c.top()<<endl;
        }
        else
        {
            //cout<<c.size()<<endl;
            //cout<<i;
            //cout<<c.top();
            while(c.top()!='(')
            {
                a=c.top();
                c.pop();
                d=x.top();
                x.pop();
                e=x.top();
                x.pop();
                if(c.top()=='*')
                {
                    f=x.top();
                    x.pop();
                    switch(a)
                    {
                            case '+':x.push(d+e*f); break;
                            case '-':x.push(e*f-d); break;
                            case '*':x.push(d*e*f); break;
                            case '/':x.push(e*f/d); break;
                        }
                    c.pop();
                    }
                    else
                        if(c.top()=='/')
                        {
                            f=x.top();
                            x.pop();
                            switch(a)
                            {
                                case '+':x.push(d+f/e); break;
                                case '-':x.push(f/e-d); break;
                                case '*':x.push(f/e*d); break;
                                case '/':x.push(f/e/d); break;
                            }
                            c.pop();
                        }
                        else
                        {
                            switch(a)
                            {
                                case '+':x.push(d+e); break;
                                case '-':x.push(e-d); break;
                                case '*':x.push(d*e); break;
                                case '/':x.push(e/d); break;
                            }
                        }
                }
                c.pop();
            }
        }
    while(c.size()>0)
            {
                a=c.top();
                c.pop();
           //     cout<<a<<' '<<c.size()<<endl;
                d=x.top();
                x.pop();
                e=x.top();
                x.pop();
            if(c.size()>0)
            {
                if(c.top()=='*')
                {
                    f=x.top();
                   // cout<<f<<c.top()<<e<<a<<d<<'='<<f*e+d<<endl;
                    x.pop();
                    switch(a)
                    {
                            case '+':x.push(f*e+d); break;
                            case '-':x.push(f*e-d); break;
                            case '*':x.push(f*e*d); break;
                            case '/':x.push(f*e/d); break;
                    }
                    c.pop();
                    }
                    else
                        if(c.top()=='/')
                        {
                            f=x.top();
                            x.pop();
                            switch(a)
                            {
                                case '+':x.push(f/e+d); break;
                                case '-':x.push(f/e-d); break;
                                case '*':x.push(f/e*d); break;
                                case '/':x.push(f/e/d); break;
                            }

                    c.pop();
                        }
                        else
                        {
                            switch(a)
                            {
                                case '+':x.push(d+e); break;
                                case '-':x.push(e-d); break;
                                case '*':x.push(d*e); break;
                                case '/':x.push(e/d); break;
                            }
                        }
                 //   cout<<'a'<<endl;
            }
            else
            {
              //  cout<<a<<' '<<d<<' '<<e;
                switch(a)
                            {
                                case '+':x.push(d+e); break;
                                case '-':x.push(e-d); break;
                                case '*':x.push(d*e); break;
                                case '/':x.push(e/d); break;
                            }
                //cout<<'b';
                }
           // cout<<x.top()<<endl;
        }
    so<<x.top();
}